can you imagine if that were to happen in the u.s.? >> reporter: running a sophisticated sports doping program isn't cheap. landis says the team paid for it in part by selling equipment. >> one way was to sell bicycles and products they got from sponsors. i know there was bicycles sold. >> reporter: the claims are being investigated. meanwhile, the head of the world anti-doping agency items "nightline," we believe what landis is saying now has to be fully and properly investigated. we have total faith in those who are entrusted with the investigation, so much so that we are trying to facilitate a global one. this was a big decision for you. why did you want to come out and talk today? >> well, it's about the truth. it's about -- it's about me feeling better. for having misled the public. and i would like to take that opportunity today to just say that i'm sorry for having lied. i'm glad i don't have to lie. it was hard to do interviews where i was lying. i'll feel better when i'm done talking to you. >> reporter: are you scared? you've